Welland was suffering from Alzheimer's disease for several years, said The Hollywood Reporter.
He won a best original screenplay Oscar for "Chariots of Fire," which was based on the athletes competing at the 1924 Olympics, in 1982.
Welland also had successful stint with acting. He received a best supporting BAFTA award for playing an English teacher in Ken Loach's "Kes".
He also won a BAFTA award for writing TV plays in 1971.
His other credits as a writer include- 1979 film, "Yanks" starring Vanessa Redgrave and Richard Gere and "Twice in a Lifetime" that released in 1985.
"We are proud of Colin's many achievements during his life, but most of all he will be missed as a loving and generous friend, husband, father and granddad," a family member said in a statement.
He is survived by his wife Patricia, four children and six grandchildren.
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